Rubber sleeve assembly

Abstract

The utility model provides a rubber sleeve assembly, and belongs to the technical field of automobile accessories. The problem that an existing rubber sleeve assembly is prone to failure is solved. The rubber sleeve assembly comprises a middle shaft, an outer sleeve and a rubber sleeve, the middle shaft comprises a cylindrical section and flat square heads located at the two ends of the cylindrical section, the outer sleeve is arranged on the outer side of the cylindrical section in a sleeving mode, the rubber sleeve is fixed between the cylindrical section and the outer sleeve, and each flat square head is provided with two flat square planes facing opposite directions. Side arc parts protruding out of the corresponding flat square planes are arranged on the cylindrical section, side protruding parts protruding out of the outer side face of the cylindrical section are arranged on the two sides of each flat square head, extending rings axially protruding out of the cylindrical section are arranged at the two ends of the rubber sleeve, and each extending ring abuts against and is fixed to the end face of the corresponding side arc part, the corresponding flat square plane and the corresponding side protruding part. The rubber sleeve assembly is not easy to fail.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories and relates to a rubber sleeve assembly. Background Art

[0002] Suspension is the general term for the force transmission connection device between the wheels and the body of a car, including elastic elements, shock absorbers and force transmission devices, which play the role of buffering, vibration reduction and force transmission respectively. The force transmission device includes control arms, tie rods and stabilizer bars, etc. Ball head assemblies and rubber sleeve assemblies are used for connection on control arms, tie rods and stabilizer bars.

[0003] Chinese patent literature has disclosed a control arm assembly [application number: CN201921146059.6; announcement number: CN210191063U], including an arm body, a ball head assembly and a shaft rubber sleeve assembly. The shaft rubber sleeve assembly is one of the rubber sleeve assemblies, including an intermediate shaft, an outer sleeve and a rubber sleeve. The intermediate shaft includes a cylindrical section located in the middle and a flat square head located at both ends. The outer sleeve is arranged on the outside of the cylindrical section, and the rubber sleeve is fixed between the cylindrical section and the outer sleeve. Generally, the outer sleeve is fixed on the control arm, and the intermediate shaft is connected to the frame. When the car vibrates, the intermediate shaft will vibrate axially and radially relative to the outer sleeve. Since the inner side of the rubber sleeve is only fixed against the outer side of the cylindrical section, and only one end of the intermediate shaft is provided with a retaining ring for axial limiting, only one-way limiting can be performed. In this way, when the axial vibration (bidirectional) of the intermediate shaft is too large, it is easy to separate the rubber sleeve from the cylindrical section, resulting in failure of the shaft rubber sleeve assembly. Utility Model Content

[0004] The purpose of the utility model is to propose a rubber sleeve assembly in view of the above problems existing in the prior art, thereby solving the technical problem that the prior rubber sleeve assembly is prone to failure.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A rubber sleeve assembly includes an intermediate shaft, an outer sleeve and a rubber sleeve, wherein the intermediate shaft includes a cylindrical section and flat square heads located at both ends of the cylindrical section, the outer sleeve is arranged on the outside of the cylindrical section and the rubber sleeve is fixed between the cylindrical section and the outer sleeve, each flat square head has two flat square planes facing opposite directions, the cylindrical section has a side arc portion protruding from the corresponding flat square plane, and each flat square head has side convex portions protruding from the outer side surface of the cylindrical section on both sides, characterized in that both ends of the rubber sleeve have extension rings protruding axially from the cylindrical section, and each extension ring is abutted and fixed to the corresponding side arc end face, flat square plane and side convex portion.

[0007] Extension rings are provided at both ends of the rubber sleeve, and the extension rings are abutted and fixed to the end faces of the side arc portions, the flat square plane and the side convex portions, which not only increases the joint surface area between the two ends of the rubber sleeve and the intermediate shaft, which is beneficial for making the rubber sleeve and the intermediate shaft more firmly fixed, but also when the intermediate shaft vibrates axially, the two extension rings can be used for bidirectional axial limiting and buffering, avoiding excessive axial displacement of the intermediate shaft, reducing the possibility of separation of the rubber sleeve and the intermediate shaft, and making the rubber sleeve assembly less likely to fail.

[0008] In the above-mentioned rubber sleeve assembly, at least one extension ring is abutted against and fixed to the outer side surface of the lateral protrusion. This arrangement increases the axial length of at least one extension ring, and also increases the bonding surface area of ​​at least one extension ring and the intermediate shaft, making the rubber sleeve and the intermediate shaft more firmly fixed, which is conducive to making the rubber sleeve assembly less likely to fail.

[0009] In the above rubber sleeve assembly, both end faces of each side arc portion are inclined, which can increase the bonding surface area between the end face of the side arc portion and the extension ring, making the extension ring and the intermediate shaft more firmly fixed, which is conducive to making the rubber sleeve assembly less likely to fail.

[0010] In the above rubber sleeve assembly, each side protrusion is inclined toward the end surface of the cylindrical section. The inclined arrangement can increase the bonding surface area between the end surface of the side protrusion and the extension ring, making the extension ring and the intermediate shaft more firmly fixed, which is conducive to making the rubber sleeve assembly less likely to fail.

[0011] In the above-mentioned rubber sleeve assembly, one of the flat square heads is provided with a round hole, the other flat square head is provided with a strip hole, and the flat square head provided with the strip hole is provided with an identification groove. The provision of the identification groove facilitates the distinction between the two flat square heads, prevents the installation direction of the rubber sleeve assembly on the control arm from being reversed, and facilitates the smooth assembly of the control arm.

[0012] In the above-mentioned rubber sleeve assembly, the flat square head with the round hole is provided with a chamfer. The chamfer also has a marking function, making it easier to distinguish the two flat square heads.

[0013] In the above rubber sleeve assembly, the outer sleeve is eccentrically arranged with respect to the cylindrical section, and the axis of the outer sleeve is offset toward one of the side arc portions. This can increase the interval between one of the side arc portions and the outer sleeve, increase the wall thickness of the rubber sleeve between the side arc portion and the outer sleeve, and enable the rubber sleeve assembly to withstand more radial force at the side arc portion.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] Extension rings are provided at both ends of the rubber sleeve, and the extension rings are abutted and fixed to the corresponding side arc end faces, flat square planes and side convex portions, so that the rubber sleeve and the intermediate shaft are stably fixed, and the two extension rings can be used to perform bidirectional axial limiting and buffering when axial vibration occurs to the intermediate shaft, so that the rubber sleeve assembly is not easy to fail, thereby increasing the service life of the rubber sleeve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the rubber sleeve assembly.

[0017] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0018] Figure 3 yes Figure 1 Right view of .

[0019] In the figure, 1, outer sleeve; 2, intermediate shaft; 2a, cylindrical section; 2a1, side arc portion; 2b, flat square head; 2b1, flat square plane; 2b2, side convex portion; 2c, round hole; 2d, strip hole; 2e, identification groove; 2f, chamfer; 3, rubber sleeve; 3a, extension ring. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 and Figure 2 As shown, a rubber sleeve assembly includes an intermediate shaft 2, an outer sleeve 1 and a rubber sleeve 3. The intermediate shaft 2 includes a cylindrical section 2a and flat square heads 2b located at both ends of the cylindrical section 2a. The outer sleeve 1 is sleeved on the outside of the cylindrical section 2a and the rubber sleeve 3 is fixed between the cylindrical section 2a and the outer sleeve 1. The outer side surface of the rubber sleeve 3 is abutted and fixed to the inner side surface of the outer sleeve 1, and the inner side surface of the rubber sleeve 3 is abutted and fixed to the outer side surface of the cylindrical section 2a. The outer sleeve 1 is cylindrical, the cylindrical section 2a is cylindrical, and the flat square head 2b is flat square. Each flat square head 2b has two flat square planes 2b1 facing oppositely, and the two flat square planes 2b1 on each flat square head 2b are parallel to each other and symmetrically arranged. The two flat square heads 2b have the same circumferential position on the intermediate shaft 2, and the two flat square planes 2b1 facing the same direction are located on the same plane.

[0022] like Figure 1 As shown, the cylindrical section 2a has a side arc portion 2a1 protruding from the corresponding flat square plane 2b1, and there are two side arc portions 2a1 and they are symmetrically arranged. The end surfaces of both ends of each side arc portion 2a1 are inclined. Figure 2As shown, each flat square head 2b has side protrusions 2b2 protruding from the outer side surface of the cylindrical segment 2a on both sides, and the two side protrusions 2b2 on the same flat square head 2b are symmetrically arranged. A circular hole 2c is provided on one of the flat square heads 2b, and a strip hole 2d is provided on the other flat square head 2b. A chamfer 2f is provided on the flat square head 2b provided with the circular hole 2c, and an identification groove 2e is provided on the flat square head 2b provided with the strip hole 2d. In the figure, the flat square head 2b provided with the circular hole 2c is located on the left side of the cylindrical segment 2a, and the flat square head 2b provided with the strip hole 2d is located on the right side of the cylindrical segment 2a. Each side protrusion 2b2 is inclined toward the end face of the cylindrical segment 2a.

[0023] like Figure 1 and Figure 2 As shown, both ends of the rubber sleeve 3 have extension rings 3a axially protruding from the cylindrical section 2a, and each extension ring 3a is abutted and fixed to the corresponding end surface of the side arc portion 2a1, the flat square plane 2b1, and the end surface of the side convex portion 2b2 facing the cylindrical section 2a. At least one extension ring 3a extends to the outside of the side convex portion 2b2 and abuts and fixes to the outer side surface of the side convex portion 2b2. Figure 2 As shown, the extension ring 3a on the right side is attached to and fixed on the outer side of the side protrusion 2b2. Alternatively, the two extension rings 3a can be extended to the outer side of the corresponding side protrusion 2b2 respectively, and attached to and fixed on the outer side of the corresponding side protrusion 2b2.

[0024] like Figure 1 and Figure 3 As shown, the outer sleeve 1 is eccentrically arranged with the cylindrical section 2a, and the axis of the outer sleeve 1 is offset toward one of the side arc portions 2a1. The axial length of the outer sleeve 1 is smaller than the axial length of the cylindrical section 2a, and the outer sleeve 1 is axially close to the flat square head 2b provided with the strip hole 2d. The outer side surface of the extension ring 3a and the end surface of the extension ring 3a have a rounded transition to reduce stress concentration.

[0025] Extension rings 3a are provided at both ends of the rubber sleeve 3, and the extension rings 3a are abutted and fixed to the end faces of the side arc portion 2a1, the flat square plane 2b1 and the side convex portion 2b2, which not only increases the joint surface area between the two ends of the rubber sleeve 3 and the intermediate shaft 2, which is beneficial to make the rubber sleeve 3 and the intermediate shaft 2 more firmly fixed, but also when the intermediate shaft 2 vibrates axially, the two extension rings 3a can be used to perform bidirectional axial limiting and buffering, thereby avoiding excessive axial displacement of the intermediate shaft 2, reducing the possibility of separation of the rubber sleeve 3 and the intermediate shaft 2, and making the rubber sleeve assembly less likely to fail.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A rubber sleeve assembly, comprising an intermediate shaft (2), an outer sleeve (1) and a rubber sleeve (3), wherein the intermediate shaft (2) comprises a cylindrical section (2a) and flat square heads (2b) located at both ends of the cylindrical section (2a), the outer sleeve (1) is sleeved on the outer side of the cylindrical section (2a) and the rubber sleeve (3) is fixed between the cylindrical section (2a) and the outer sleeve (1), each flat square head (2b) has two flat square planes (2b1) facing oppositely, the cylindrical section (2a) has a side arc portion (2a1) protruding from the corresponding flat square plane (2b1), and each flat square head (2b) has side convex portions (2b2) ​​protruding from the outer side surface of the cylindrical section (2a) on both sides, characterized in that: Both ends of the rubber sleeve (3) are provided with extension rings (3a) axially protruding from the cylindrical section (2a), and each extension ring (3a) is abutted against and fixed to the corresponding end face of the side arc portion (2a1), the flat square plane (2b1) and the side convex portion (2b2).

2. The rubber sleeve assembly according to claim 1, characterized in that: At least one extension ring (3a) is in contact with and fixed to the outer side surface of the side protrusion (2b2).

3. The rubber sleeve assembly according to claim 1, characterized in that: Both end surfaces of each side arc portion (2a1) are inclined.

4. The rubber sleeve assembly according to claim 1, characterized in that: Each side protrusion (2b2) ​​is arranged inclined toward the end surface of the cylindrical section (2a).

5. The rubber sleeve assembly according to any one of claims 1 to 4, characterized in that: One of the flat square heads (2b) is provided with a round hole (2c), the other flat square head (2b) is provided with a strip hole (2d), and the flat square head (2b) provided with the strip hole (2d) is provided with a marking groove (2e).

6. The rubber sleeve assembly according to claim 5, characterized in that: The flat square head (2b) provided with the circular hole (2c) is provided with a chamfer (2f).

7. The rubber sleeve assembly according to any one of claims 1 to 4, characterized in that: The outer sleeve (1) is eccentrically arranged with respect to the cylindrical section (2a), and the axis of the outer sleeve (1) is offset toward one of the side arc portions (2a1).

Images